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Statistical bulletin Woodland natural capital accounts, UK: 2020 Natural capital accounts containing information on ecosystem services for woodlands in the UK. Contact: Release date: Next release: Hazel Trenbirth and Adam Dutton 28 February 2020 To be announced natural.capital.team@ons.gov.uk +44 (0)1633 580051 Correction 11 March 2020 11:34 Due to a typing error, a single word was missing in the Energy: wood fuel paragraph of Section 5: Provisioning ecosystem services: quantity and value, which has now been corrected. 26 March 2020 14:00 A correction has been made to the total annual value of ecosystem services. This was because of a formula error in the spreadsheet. This has affected the Main points, Section 4: Overall quantity and value of woodland ecosystem services, Figure 8 and Woodland natural capital accounts, UK: supplementary information . We apologise for any inconvenience this may have caused. Page 1 of 47
Table of contents 1. Main points 2. Size of the area covered by woodland 3. Condition of UK woodlands 4. Overall quantity and value of woodland ecosystem services 5. Provisioning ecosystem services: quantity and value 6. Regulating ecosystem services: quantity and value 7. Cultural ecosystem services: quantity and value 8. Asset value of woodlands 9. Woodland ecosystem services data 10. Glossary 11. Measuring the data 12. Strengths and limitations 13. Related links Page 2 of 47
1 . Main points There were an estimated 475 million visits to woodlands in 2017, on which the public spent £515.5 million collectively. The non-market benefits of woodland exceed the market benefits of timber by approximately 12 times; timber represents £275.4 million out of £3.3 billion total annual value of woodland in 2017. The asset value of UK woodlands was estimated as £129.7 billion in 2017, with timber representing £8.9 billion (6.9%). The removal of air pollution by woodland in the UK equated to a saving of £938.0 million in health costs in 2017. Woodland in the UK removed 18.1 million tonnes of carbon dioxide equivalent in 2017, equating to a value of £1.2 billion; this is equivalent to 4% of total UK greenhouse gas emissions in 2017. 1 Urban woodlands cooled 11 city regions sufficiently on hot days to save £229.2 million in labour productivity and avoided air conditioning costs during 2018. Woodlands occupy 13% of the land area of the UK with 3.2 million hectares. Notes for: Main points 1. Total greenhouse gas emissions in 2017 were 460 MtCO2e. 2 . Size of the area covered by woodland Woodlands in the UK are tree-covered areas, which include plantation forests, more natural forested areas, and lower density or smaller stands of trees. The natural world is valued in many different and important ways, but it can be valued as a set of assets supplying goods and services that the economy and society benefit from. For example, food, water or clean air. These habitat capital accounts monitor the size and condition of woodland assets as well as the quantity and value of the services supplied. Page 3 of 47
Figure 1: Extent of Great Britain woodland, 2018 Source: Forestry Commission – National Forest Inventory Page 4 of 47
Figure 2: Extent of Northern Ireland woodland, 2018 Source: Forestry Commission – National Forest Inventory Land covered by forestry (Figures 1 and 2) has increased steadily by 4.4% from 3.05 million hectares in 2009 to 3.19 million hectares in 2019. Scotland has 46% of the UK’s woodlands, England has 41%, Wales has 10% and Northern Ireland has 4%. As a percentage of the total land area, woodlands account for: 13% of the UK 10% of England 15% of Wales 18% of Scotland 8% of Northern Ireland Conifers account for approximately half (51%) of the UK woodland area in 2019 (Figure 3), with just over half (55%) of these conifers privately owned. In contrast, the majority (92%) of broadleaved woodland is privately owned. Page 5 of 47
The proportion of woodland that is publicly owned fell slightly in the past 10 years, from 29% (872,000 hectares) of total woodland in 2009 to 27% (863,000 hectares) of total woodland in 2019, with the private ownership proportion rising from 71% (2,182,000 hectares) in 2009 to 73% (2,325,000 hectares) in 2019. National Forest Inventory (NFI) statistics from the Forestry Commission have been used for the extent account as it provides the most up-to-date dataset focussing solely on woodland. Currently, only woodland used for forestry that is over 0.5 hectares in extent and greater than 20 metres in width is included in the extent account. This includes areas recently felled but expected to be replanted and open space within woodland. Figure 3: Conifers accounted for 51% of UK woodland area in 2019 Extent of woodland, UK, 2007 to 2019 Source: Forest Research – National Forest Inventory In addition to woodland areas, the Forestry Commission estimates there are 390,000 hectares of small woods in Great Britain (non-NFI wooded areas of over 0.1 hectare in extent). There are also 255,000 hectares of groups of trees (that is, clusters and linear tree features of less than 0.1 hectare in extent) and an estimated total canopy cover of 97,000 hectares from lone trees in Great Britain (Figure 4). For Great Britain, that is a total woodland area of 3,719,000 hectares. Page 6 of 47
Figure 4: Lone trees represented 2.6% of woodland area in 2019 for Great Britain Total woodland extent, UK and Great Britain, 2019 Source: Forest Research and Forestry Commission – National Forest Inventory 3 . Condition of UK woodlands The health of woodlands can be measured through a range of metrics. Woodland age structure, the variety of trees present, presence of different mammals and birds, the understory vegetation, and the presence of deadwood all reflect woodland ecological health. Ecologists regularly use a simple set of descriptive words to summarise the overall status of a habitat or species: “Favourable” being good, “Unfavourable” being bad, and “Destroyed” meaning the habitat at a site is no longer present and there is no prospect of being able to restore it. These descriptions are based on an assessment of an appropriate set of metrics dependent on what is being measured. While certified woodlands and access are increasing, several indicators of woodland condition are unfavourable or in decline (Table 1). Out of the seven NFI condition indicators, two are considered unfavourable across the majority of woodland: the presence of veteran trees and deadwood (Figure 5). The butterfly and bird indices for woodlands are both in a long-term decline, having a negative impact on biodiversity. Woodland fires in the UK also have a negative impact. There has been a significant rise in the area of woodlands having large fires over the last decade, with 29,396 hectares affected during 2019 to 2020 (Table 7). There has been an increase in the area of Forest Stewardship Council (FSC) certified woodlands and increased access to woodlands for the population. An estimated 74% of the population have access to woodland within four kilometres of their home, as of 2017. Page 7 of 47
Table 1: Summary of the condition of UK woodlands Short term Type Indicator Condition Long term trend trend Biodiversity Butterfly index UK Long term decline 1990 to 2018 Declining Little or no change Woodland bird Decrease of 29% between 1970 to Declining Declining index UK 2018 Tree age structure NFI first assessment 42% area GB unfavourable Regeneration GB NFI first assessment 0% area unfavourable Veteran trees GB NFI first assessment 99% area unfavourable Tree health GB NFI first assessment 85% area favourable Deadwood GB NFI first assessment 77% area unfavourable Herbivores & NFI first assessment 49% area grazing GB favourable Invasive plant NFI first assessment 92% area species GB favourable Certified Area FSC certified Improvement 32% from 2001 to 2019 Increasing Increasing woodlands woodlands UK Space for Access to Improvement 0.1% from 2012 to 2016 Increasing Increasing people woodlands UK Protected sites Scotland SSSIs 51% favourable in 2018 /SACs England SSSIs 37% favourable 2018/19 Pressure Wildfires UK 2019-20 29,396 hectares affected Increasing Increasing indicators (EFFIS data) Source: Department for Environment, Food and Rural Affairs; British Trust for Ornithology; Royal Society for the Protection of Birds; Joint Nature Conservation Committee; Butterfly Conservation Society; Centre for Ecology and Hydrology; Forest Research; Woodland Trust; and European Forest Fire Information System Notes 1. The long-term and short-term trend vary depending on the dataset. Each dataset has a different time series; therefore short term refers to the most recent year’s data available. Back to table There is significant variation in condition scores across various metrics. For example, very few forests are “favourable”, but 85% of woodland is favourable for tree health (Figure 5). Page 8 of 47
Figure 5: 85% of woodlands are in a favourable condition for tree health in Great Britain Summary of National Forest Inventory (NFI) condition indicators 2010 to 2015 survey cycle, percentage of area classified as unfavourable, intermediate or favourable Source: Forest Research – National Forest Inventory Biodiversity Biodiversity, though its impact is hard to quantify, lies at the heart of or at least affects all woodland ecosystem services. Examples of biodiversity include the roles of fungi and bacteria, nutrient cycles, and culturally important mammals and birds. Increasing biodiversity improves the provision and sustainability of ecosystem services (ZIP, 2.67MB). The ecology of woodlands is mainly determined by the amount of light beneath the canopy, if the tree species are native or non-native, the age of the trees, and the number of different microhabitats available. The Forestry Commission identified (PDF, 259KB) that while there is no definitive relationship between tree age and biodiversity, there is evidence of an increase in biodiversity with stand age. The analysis for mammals and birds revealed that after a short initial increase, as trees grow from saplings, there is a decline in biodiversity until the trees reach 20 years of stand age, then it increases. Indicators of biodiversity in woodlands investigated in this publication include the woodland butterflies and bird indices, age of the trees, presence of veteran trees, health of the trees, and impacts from herbivore grazing and invasive plant species. Page 9 of 47
Butterfly index The number of woodland butterflies has been decreasing over time. In 2012, it began to flatten, showing little to no change in the index, as seen in the smoothed data. According to the Department for Environment, Food and Rural Affairs’ (Defra’s) Butterflies in England report , this long-term decline is largely because of fewer open spaces within woodland and a lack of management of these woodlands. This includes thinning trees within woodlands to allow sufficient light in, thereby helping with the growth of multiple food sources. When unmanaged, these food sources do not grow sufficiently, leaving butterfly species without the necessary nutrients to survive within the woodland. The unsmoothed (raw) index for butterflies shows fluctuation throughout the entire time series (Figure 6). This is because of the butterflies’ response to weather conditions, such as the summer heatwave in 2018 . This change in weather caused around two-thirds of species to increase that season. The State of the UK’s Butterflies 2015 report observes that many butterfly species have been declining since 1976. But there are three species that have shown a positive response: the ringlet, orange-tip and peacock. Figure 6: The woodland butterfly population is in a long-term decline Woodland Butterfly Index, UK, 1990 to 2018 Source: Butterfly Conservation; Centre for Ecology and Hydrology; Department for Environment, Food and Rural Affairs – Woodland Butterfly Index Page 10 of 47
Bird index Woodland bird populations decreased by 29% between 1970 to 2018, a very similar decrease to that of the butterfly population but at a much slower rate. We can see that there was a steep decrease in the 1990s, with the index then beginning to flatten. That is, until 2012, when the index once again began to decline (Figure 7). Some possible reasons for this decline are outlined in the following, but none of these can be confirmed and the Royal Society for the Protection of Birds (RSPB) is investigating for a more concrete explanation. The majority of woodland bird species have either decreased (32%) or had no change at all (46%) over the long term, with a minority of 22% increasing over time such as the great spotted woodpecker and the nuthatch. According to Defra’s Wild Bird Populations in the UK, 1970 to 2018, this decrease may be a result of a lack of woodland management along with increased deer-browsing pressure. Both of these result in a lack of diversity within woodland and few suitable nesting habitats. The willow tit species has experienced the largest decline at 94% since 1970. While the reason for this large decline is unclear, the RSPB’s managing willow tit habitat project highlights changes in habitat structures and the drying out of woodland soils as possible reasons for this, among others. Figure 7: Woodland bird populations decreased by 29% between 1970 to 2018 Woodland Bird Index, UK, 1990 to 2018 Source: British Trust for Ornithology; Royal Society for the Protection of Birds; Department for Environment, Food and Rural Affairs – Woodland Bird Index Page 11 of 47
Bats Some bat species are heavily dependent on woodlands and so can also be used as a biodiversity condition indicator for woodlands. The Bat Conservation Trust has identified six species that are woodland specialists. These are Bechstein’s bats, barbastelles, Natterer’s bats, noctules, lesser horseshoe bats and brown long-eared bats. The Bat Conservation Trust will be instigating monitoring of woodland bat populations in summer 2020, with an initial baseline index value available in spring 2021 and a provisional trend available from spring 2023. National Forest Inventory (NFI) condition indicators The NFI survey is based on data collected between 2009 and 2015. Full details on the Forest Research’s NFI survey methods are available. Table 2: Summary NFI condition indicators for Great Britain, 2010 to 2015 survey cycle Unfavourable Intermediate Favourable Invasive species 7.3 0.8 91.9 Tree health 2.6 12.9 84.5 Herbivores and grazing 40.0 11.4 48.6 Regeneration 0.0 89.4 10.6 Age distribution 42.0 46.9 11.2 Deadwood 76.6 17.3 6.1 Veteran trees 99.3 0.2 0.5 Source: Forest Research – National Forest Inventory A varied tree age structure in woodland benefits biodiversity as differently aged trees provide different ecological habitats. As a percentage of the total trees in Great Britain : 24.3% of trees are aged 20 years or younger 33.0% of trees are aged 21 to 40 years 23.9% of trees are aged 41 to 60 years 18.8% of trees are aged 61 years or older For a woodland to be classified as favourable, it needs to have young, intermediate and old trees present. Regeneration is an important indicator of biodiversity to predict the future health of woodlands. It is an assessment of seedlings, saplings and young trees. To be classed as favourable, the woodland areas sampled need to have trees with a 4cm to 7cm diameter as well as having saplings and seedlings present. Tree diseases and pests can have a negative impact on woodland biodiversity. While dead and decaying wood provides more light to reach the forest floor and an important micro-habitat, rapid widespread tree death can harm ecological health. Page 12 of 47
The NFI investigated tree health. This was calculated using a combination of survey data on tree mortality, tree health indicator of crown dieback and tree diseases for a condition calculator. A Statutory Plant Health Notice (SPHN) is issued to fell diseased trees to prevent the spread of diseases and pests. Table 3: Number of sites where a Statutory Plant Health Notice has been served, UK, between 2010 to 2011 and 2018 to 2019 Year England Wales Scotland Northern Ireland UK 2010 to 2011 114 46 1 10 171 2011 to 2012 131 90 14 16 251 2012 to 2013 168 89 123 15 395 2013 to 2014 244 272 76 28 620 2014 to 2015 140 71 9 17 237 2015 to 2016 73 57 34 3 167 2016 to 2017 75 53 71 0 199 2017 to 2018 43 153 71 14 281 2018 to 2019 136 215 491 0 842 Source: Forestry Commission, Scottish Forestry, Natural Resources Wales, and Forest Service Table 4: Felling areas under Statutory Plant Health Notices, thousand hectares, UK, between 2010 to 2011 and 2018 to 2019 Year England Wales Scotland Northern Ireland UK 2010 to 2011 1.2 0.8 0.0 0.3 2.3 2011 to 2012 0.5 0.5 0.1 0.1 1.1 2012 to 2013 0.5 1.5 0.4 0.2 2.5 2013 to 2014 0.8 4.6 0.3 0.5 6.2 2014 to 2015 0.3 0.4 0.0 0.0 0.7 2015 to 2016 0.2 1.5 0.1 0.0 1.8 2016 to 2017 0.3 0.2 0.2 0.0 0.7 2017 to 2018 0.1 1.3 0.3 0.1 1.7 2018 to 2019 0.6 1.9 1.4 0.0 3.8 Source: Forestry Commission, Scottish Forestry, Natural Resources Wales, and Forest Service Invasive species are one of the major causes of biodiversity loss. One estimate put the cost of invasive non- native species in the UK at £1.8 billion per year. The NFI estimates 221,723 hectares are classified as unfavourable for invasive species. For example, rhododendron is a prominent invasive species in UK woodlands. Page 13 of 47
Damage from herbivores may impact biodiversity when there is excessive browsing, especially from deer, as it can impact on natural regeneration. The NFI investigated the damage done by herbivores from browsing and stripping the bark damage and found woodlands classified as unfavourable for grazing and herbivore damage account for 40% of total woodlands (Table 2). The presence of veteran trees in a woodland is considered a boost to biodiversity as they create unique micro- habitats supporting a wide range of other organisms. Forest Research uses Natural England’s definition of a veteran tree (PDF, 339KB) as “A tree that is of interest biologically, culturally or aesthetically because of its age, size or condition”. The NFI considers a woodland as being in a favourable condition when two or more veteran trees are present per hectare. The inventory only classified 0.5% of all woodland area as favourable for veteran trees (Table 2). However, veteran trees are commonly found outside of woodlands in parklands, hedgerows and wood pasture, which are not currently included as they do not meet the NFI’s classification of a woodland. Deadwood is important for woodland biodiversity. It provides an important habitat for small animals, cavity-nesting birds, insects dependent on decomposing wood and decomposer fungi. The NFI considers a favourable condition for deadwood to be greater than or equal to 80 cubic metres per hectare for volume of deadwood lying or standing. Of all woodland in Great Britain, 6.1% is considered favourable for deadwood (Table 2). Certified woodlands In the UK, certified woodland has been independently audited against the UK Woodland Assurance Standard (UKWAS). One certification scheme is the FSC. In March 2019, 1.4 million hectares of woodland in the UK were FSC certified. This represented 44% of the total UK woodland area and is an increase of 32% since December 2001. To be FSC certified, woodland managers are required to meet certain standards to ensure the forest is being managed in a way that preserves the natural ecosystem. Another scheme is the Programme for the Endorsement of Forest Certification (PEFC) . At present, all woodlands in the UK that are certified under PEFC are also certified under FSC. Access to woodlands Accessible woodland is an indicator of the ability to supply recreational services to the population. It is defined as “any site that is permissively accessible to the general public for recreational purposes”. The area of accessible woodland increased slightly (0.1%) between the years 2012 to 2016 (Table 5). The estimated percentage of the UK population with access to 20 hectares of woodland within four kilometres of their home also increased, from 61% in 2007 to 74% in 2017. Table 5: Area of recorded accessible woodland, hectares, UK, 2012 and 2016 Area accessible woodland hectares % Region 2012 2016 change England 382,407 397,149 3.9 Wales 121,192 120,317 -0.7 Scotland 780,484 765,204 -2.0 Northern Ireland 73,696 75,929 3.0 UK total 1,357,779 1,358,599 0.1 Source: Woodland Trust – Space for people Page 14 of 47
Protected sites There are several formal designations, including Special Areas of Conservation (SACs) or Sites of Special Scientific Interest (SSSIs) in Great Britain and Areas of Special Scientific Interest (ASSIs) in Northern Ireland. An SSSI or ASSI is an area of interest to science that has rare fauna or flora present or important geological or physiological features. In Northern Ireland, the area of woodland with a protected site designation of SSSI or ASSI and SAC is 4.4% of total woodland; for Great Britain, this is 8.3% of total woodland. In 2018, Scottish Natural Heritage identified 50% of its broadleaved, mixed and yew woodland SSSIs and SACs as being in a favourable condition. Of Scotland’s coniferous woodland protected areas, 61% are in favourable condition. There were improvements across all broad woodland types in protected areas from 2007, when only 46% of broadleaved, mixed and yew woodlands were favourable and 53% of coniferous sites were favourable. Scottish investigations by the Joint Nature Conservation Committee (JNCC) revealed no obvious differences in the underlying pressures and issues affecting the condition of coniferous woodlands in comparison with broadleaved woodlands. The most frequently reported activity for unfavourable condition is over-grazing. Over-grazing leads to a lack of regeneration. Forestry England identified for 2018 to 2019 that 37% of woodland SSSIs are in favourable condition, 61% are in unfavourable recovering conditions and 1% are in unfavourable declining conditions with high deer populations browsing the native flora. Table 6: Summary statistics for protected sites for broadleaved and mixed woodlands for the UK and coniferous woodlands for Scotland, 2005 SAC SSSI/ASSI Total Broad leaved and mixed Favourable condition 25% 45% 43% Monitoring coverage UK England, Scotland, Northern Ireland Coniferous Favourable condition 38% 55% 50% Monitoring coverage Scotland only Scotland only Source: Joint Nature Conservation Committee – Habitats Only 25% of the reported SAC features were in a favourable condition in 2005 for the UK broadleaved and mixed woodlands, and 38% of the coniferous SACs in Scotland were in a favourable condition (Table 6). Pressure indicators Pressure indicators are defined here as damage inflicted on woodlands by humans. We can report on litter, fly tipping, dog fouling, vandalism and farm waste. Wildfires can also be considered a pressure indicator; most UK wildfires are started by people, with and without intent. Wildfires are increasingly in the news worldwide as climate change leads to hotter and drier springs and summers. In some parts of the world, fire has long been an important part of natural and human ecological management. This is especially true for woodlands. However, in the UK woodlands, fires almost all have negative impacts. Page 15 of 47
Most UK wildfires are set by humans rather than natural. The vast majority of UK wildfires occur in open landscapes. Most of the prominent wildfires in recent years within the UK have occurred on mountains, moors, heaths and grasslands. Climate change is expected to increase the number of woodland wildfires in the UK. Management of forests is being adapted to cope with this, including more broken up planting, training of fire services and species changes. There are two main sources of data on wildfires: reported fires and satellite data. Reported fires catch wildfires of all sizes attended by England’s Fire and Rescue Services but may miss some remote fires that are addressed by land managers. Satellite data capture fires in both built up and remote places but might miss smaller fires under 30 hectares. Forestry Commission estimates (PDF, 275KB) of woodland fires are based on reported data from incidents attended by Fire and Rescue Services and so may miss some remote fires. EU-wide reporting on overall forest wildfires is based on satellite data. For this reason, the two datasets are not directly relatable, but comparison can be useful (Table 7). Satellite data for the most recent years in the UK saw an apparent increase in the number and area of burning incidents. The two datasets appear to show some correlation for wildfires in earlier years and later years with the correlation of mild winters with higher temperatures, heatwaves, and prolonged dry periods across spring and summer. Periods of low wildfires correlate with heavy periods of rainfall in spring and summer as well as wetter winters. A large number of small fires are excluded from the European Forest Fire Information System (EFFIS), meaning the number of fires is smaller. Table 7: The total area of woodland fires in both datasets appear to correlate with woodland fires increasing in size, England and UK, between 2010 to 2011 and 2019 to 2020 FC Woodland Fires England EFFIS recorded Fires UK Year Number Area hectares Number Area hectares 2010 to 11 7,986 1,276 0 0 2011 to 12 8,917 8,675 44 17,197 2012 to 13 2,454 423 0 0 2013 to 14 5,058 1,508 16 5,445 2014 to 15 3,138 881 1 85 2015 to 16 5,067 1,410 4 2,127 2016 to 17 4,186 804 9 1,197 2017 to 18 19 5,126 2018 to 19 79 18,031 2019 to 20 137 29,396 Source: Forestry Commission analysis of Fire and Rescue Service Incident Recording System; National Forest Inventory; and European Forest Fire Notes 1. Number of woodland fires and area in hectares for England from Forestry Commission. Back to table 2. Number of woodland fires and area in hectares for UK fires from EFFIS. Back to table 3. EFFIS data are for calendar years. Back to table Page 16 of 47
4 . Overall quantity and value of woodland ecosystem services This section assesses the contribution woodland services provide to the economy and society. Table 8: Woodland annual physical flow by service, UK, 2010 to 2017 Type Provisioning Regulating Cultural service Carbon Pollution Noise Year Timber Woodfuel Recreation Recreation Sequestration removal reduction Total fellings (000's m3 Million tonnes Thousand Number Visits (millions) Time at habitat overbark standing) tonnes buildings (million hours) benefited 000s 2010 10,363 1,544 19 274 356 388 2011 11,345 1,544 19 273 371 414 2012 11,263 1,666 17 277 370 492 2013 11,983 1,972 18 278 399 496 2014 12,405 2,277 18 277 435 564 2015 11,255 2,400 18 273 448 544 2016 11,455 2,339 18 271 466 655 2017 11,564 2,622 18 269 167 475 718 Source: Office for National Statistics – Woodland natural capital accounts The value of woodland ecosystem services was estimated at £3.3 billion in 2017 (Figure 8). Data are only available for the seven ecosystem services annual valuations in 2017. This is a partial valuation with potentially significant exclusions such as food and Christmas trees. Page 17 of 47
Figure 8: Woodland ecosystems services were valued at £3.3 billion in 2017 Annual values woodland ecosystem services, UK, 2010 to 2018 Source: Office for National Statistics – Woodland natural capital accounts 5 . Provisioning ecosystem services: quantity and value Provisioning ecosystem services creates products. Within woodlands, these products include timber, food and bioenergy sources. Timber fellings Between 2000 and 2018, there was a 51% increase in timber production (Figure 9), with 14,797,496m 3 overbark standing timber fellings in 2018. Page 18 of 47
Figure 9: There was a 51% increase in timber production between 2000 and 2018 Total timber fellings, UK, 1976 to 2018 Source: Forestry Commission – Forestry Statistics 2019 Scottish production has driven the UK trend, with production increasing 72% between 2000 and 2018 (Figure 9). In 2018, 62% of timber was sourced from Scotland, 23% from England, 11% from Wales and 3% from Northern Ireland. Page 19 of 47
Figure 10: Timber production in the UK increased in recent years caused by a rise in private timber production Total timber fellings by public and private sector, UK, 1976 to 2018 Source: Forestry Commission – Forestry Statistics 2019 Notes: 1. Hardwood includes broadleaved trees such as oak, birch and beech. 2. Softwood includes coniferous trees such as spruce, pine and larch. Private sector production has driven much of the increase in timber fellings. In 2000, 62% of timber came from the public sector; this reduced to 38% in 2018 (Figure 10). The change is primarily because of differences in the age structure and timing of timber production between woodlands on the public and private forest estates. This is a result of a period of high levels of planting by the private sector in Scotland between 1970 and the late 1980s. The proportion of timber that is softwood and hardwood has remained fairly constant. In 2000, 93% of timber removed was softwood, rising to 94% in 2018. Page 20 of 47
Figure 11: Woodfuel increased to 21% of total timber in 2018 Total fellings showing proportion wood fuel, UK, 2000 to 2018 Source: Forestry Commission – Forestry Statistics 2019 The proportion of timber used for wood fuel increased from 3% in 2000 to 21% in 2018 (Figure 11). However, data collection methods have improved, and this may account for some of the increase. The other uses of wood processors include wood-based panel mills, pulp, paper mills and exports. Page 21 of 47
Figure 12: With increasing removals and increasing prices, timber had a series high in 2018 Timber provisioning excluding wood fuel annual value, UK, 2000 to 2018 Source: Forestry Commission – Forestry Statistics 2019 Figure 12 shows the value of timber excluding that which is used for wood fuel; this is presented in the following Energy: wood fuel subsection. The annual value of timber had a series high in 2018 at £288 million. Fluctuations in value were because of changes in stumpage price. The stumpage price is the price paid per standing tree for the right to harvest it. Using projected timber removals over the next 100 years, the asset valuation of the timber provisioning service excluding wood fuel reached £8 billion in 2018. Observing recent trends and Forestry Commission forecasts, valuations are expected to increase in the coming years as timber price and production continues to grow. Energy: wood fuel Energy from fuels created directly from plant matter or waste food are referred to as biofuels and are part of the renewable energy ecosystem service. Wood makes up a significant part of the market in biofuels in the UK, being used in domestic fires, modern pellet-burning boilers and even large electricity-generating power stations. In 2018, the generation of electricity from bioenergy, including wood fuel, accounted for 31.6% of renewable electricity generation. Since the mid-2000s, there has been an increase in the amount of timber used for wood fuel (Figure 11). Deliveries of UK-grown softwood and hardwood timber for wood fuels rose from 289 thousand cubic metres (2.9% of total timber) in 2000 to 3,100 thousand cubic metres (20.9% of total timber) in 2018. One of the reasons for the increase could be the UK Government’s Renewable Heat Incentive (RHI) , which started in 2014 and provided a financial incentive for renewable heat generated. Page 22 of 47
Figure 13: With increasing removals and price rises, the value of wood fuel continues to rise The annual value of the total timber sold as wood fuel, UK, 2000 to 2018 Source: Forestry Commission – Forestry Statistics 2019 The annual value for timber used for biofuels rose significantly between 2000 and 2018, from £3.3 million to £76.4 million (a series high) (Figure 13). Using projected timber removals over the next 100 years, the asset valuation of the timber-provisioning service for wood fuel reached £2 billion in 2018. Bioenergy has been increasing steadily since 2011. New wood-burning power plants are opening to supply increased demand, the largest being Lynemouth Power Station, a former coal-powered station that was converted to a wood-burning power plant in 2018. As biofuels are transportable, there is a significant proportion of wood pellets being imported, as the demand for wood fuel far exceeds supply in the UK. For example, Drax, which has four biomass power plants in the UK, reported using 7,171,074 tonnes of biomass pellet feedstock in 2018 with only 1% (47,740 tonnes) being sourced from the UK. Of their wood fuel, 99% is imported with 62% comes from the USA. Food Trees can both produce food directly (such as apples) and form an active part of farms in practices known as agroforestry, in which trees can be combined with livestock, crops or mixed farming. Supporters of this approach state that this land management approach has benefits that include increasing wildlife, enhancing soil health, improving animal welfare and contributing to climate change mitigation through sequestering of carbon. In the UK, this includes hedgerows and buffer strips, silvoarable cropping where alleys of trees are grown on arable land, and silvopasture where there is a mix of trees and livestock (the trees provide shade and shelter for the grazing livestock). Page 23 of 47
The Department for Environment, Food and Rural Affairs (Defra) estimates there are 551,700 hectares of agroforestry in the UK, based on a very broad definition. Livestock agroforestry is the largest area of agroforestry, at 547,600 hectares, where there is a mix of trees and livestock (Table 9). Included in the Defra estimate for livestock agroforestry are 50,700 hectares of shrubland with sparse tree cover and 239,300 hectares of grassland with sparse tree cover. Full methodology can be found in the AGFORWARD report. Table 9: The vast majority of existing uptake in the UK is agroforestry associated with livestock Estimated area of agroforestry, in thousands of hectares, UK, 2016 Type agroforestry Area thousand hectares % land area Arable 2.0 0.0 Livestock 547.6 3.3 High value tree 14.2 0.1 Total 551.7 3.3 Source: Department for Environment, Food and Rural Affairs – Agroforestry Review One proxy used by the Committee on Climate Change (CCC) on areas of agroforestry is the use of hedges and trees for buffer strips. Around 1% of agricultural land is estimated to be hedgerows in the UK. How we include food from agroforestry in these accounts will require some thought and methodological development. For example, we note that The Agroforestry Handbook includes potential net revenue gains for swapping conventional farming to selected agroforestry schemes. We need to consider whether the full food production from agroforestry is appropriate or merely the potential uplift from the regulating service provided by trees. Woodlands also contain wild foods such as mushrooms, fruit and foliage that are harvested on a non-commercial and commercial basis. Research in Scotland found that around 200 different non-timber forest products are sourced from woodlands, with 110 being edible. Other products included those for craft and medicinal use. The wild food is mainly being used by the gatherers for their households. Owing to the free nature of these foraging products, it is difficult to assess their value. However, there is a small number of gatherers who make an income from this activity. Game from hunting provides both food and recreation. Scottish research suggests approximately a quarter of red deer live in woodland. According to a Public and Corporate Economic Consultants (PACEC) 2014 survey , out of 1.8 million hectares of land managed for shooting purposes, 500,000 hectares are woodland. From 1,110 sites sampled in 2012 to 2013, on average the typical area of a hunting site that is woodland is 22%. The survey suggested 184,000 deer were shot in 2012 to 2013 in the UK across all habitats, including woodland. The PACEC survey suggests on average 97% of all game shot was destined for the food chain, from a sample of 1,050 providers. The PACEC report states that there is a small amount of income from the venison market but that this will rarely be enough to cover the costs of hunting. Forestry England also state that because of the variation in the price of venison, the costs of wildlife management exceed any income received in some years. For this reason, we are not actively developing game as a monetary account but will continue to look for overall production data. Christmas trees It is estimated that there are approximately 320 Christmas tree suppliers in the UK, selling around 7 million trees annually according to the British Christmas Tree Growers Association (BCTGA) . The BCTGA has also stated that the Christmas tree market was worth £7 million as of 1980, but there are no current data on the value of the market as at 2019. We found no verifiable data on the number of Christmas trees grown in the UK. Page 24 of 47
6 . Regulating ecosystem services: quantity and value This section discusses the benefits provided by the regulation of natural processes, including air quality regulation, climate regulation, and natural hazard regulation such as flood mitigation. Carbon sequestration The amount of carbon sequestrated by UK woodland was greater between 1998 to 2010 but fell in 2012 and has not recovered to 2011 levels (Figure 14). According to the UK Greenhouse Gas Inventory annual report , the variation in the net sink is caused by afforestation in earlier decades and the effect on the age structure of the present forest area, particularly conifer plantations. There were high levels of conifer afforestation between 1950 and 1990, but these forests are now reaching harvesting age; this means the older trees are replaced by younger trees, which have a much lower rate of carbon absorption. Figure 14: Harvesting of forests lead to lower levels of carbon sequestrated by UK woodland in the last decade relative to 2000 to 2009 Carbon sequestration by woodland, UK, 1998 to 2017 Source: National Atmospheric Emissions Inventory Despite carbon sequestration reducing over the time series, the annual value of the service has generally increased year-on-year between 1998 and 2017, reaching a high of £1.2 billion in 2017 (Figure 15). Page 25 of 47
Figure 15: The annual value of carbon sequestration by woodland in the UK reached a peak of £1.2 billion in 2017 Annual value of carbon sequestered by woodlands, UK, 1998 to 2017 Source: Office for National Statistics – Woodland natural capital accounts; National Atmospheric Emissions Inventory This is because of increases in the non-traded carbon prices, which are estimated to keep increasing until 2080. Consequently, the asset value of carbon sequestration by UK woodland was estimated to increase year on year, reaching £54.6 billion in 2017. Page 26 of 47
Figure 16: From the top 17 local authorities that sequestrated 1.5 tonnes CO2 per hectare or greater in 2017, 13 of them were in England Ratio of the forest carbon sink to the local authority area, UK, 2017 Source: National Atmospheric Emissions Inventory – prepared by the Centre for Ecology and Hydrology for the Department for Business, Energy and Industrial Strategy Page 27 of 47
We can also look at which local authorities in the UK provide the greatest amount of carbon sequestration from woodland per hectare (Figure 16). From the top 17 local authorities that sequestrated 1.5 tonnes CO2 per hectare or greater in 2017, 4 of them were in Scotland and 13 of them were in England. The ratio of woodland sequestration to the local authority area in 2017 was highest in South Ayrshire in Scotland (2.57 tonnes of CO2 equivalent by hectare), this equated to a value of £170 per hectare in 2017. Page 28 of 47
Figure 17: South Ayrshire benefitted the most from carbon removal during 2017 (based on the amount of carbon removed per hectare of local authority) Socio-economic benefit from woodland carbon sequestration per unit area of local authorities (£ per hectare), UK, 2017 Source: National Atmospheric Emissions Inventory – prepared by the Centre for Ecology and Hydrology for the Department for Business, Energy and Industrial Strategy Page 29 of 47
To show the importance of woodland, we can look at the amount of carbon that is released into the atmosphere from forest land being converted into different land types such as cropland, grassland and settlements. From the UK Greenhouse Gas Inventory , we can see that owing to woodland being converted into cropland, grassland and settlement, 1.4 million tonnes of carbon dioxide were emitted into the atmosphere in 2017 equating to a negative externality (cost) of £94.1 million. Air pollution removal In 2017, the removal of pollution by woodland in the UK equated to a saving of £938 million in health costs. The World Health Organization (WHO) estimated that air pollution contributed to 7.6% of all deaths in 2016 worldwide. Vegetation can play a useful role in lessening this danger by removing air pollution. Polluting gases are absorbed by leaves’ stomata, and particulate matter, suspended in polluted air, settles onto leaves. This physical flow account estimates the quantity of pollutants removed from the atmosphere by woodland. An annual time series from 2007 to 2017 is available in the Data section . In 2017, woodland in the UK removed 268.7 thousand tonnes of PM 10, SO2, NO, NH 3 and O3 (excludes PM2.5 as a subset of PM 10) (Figure 18). Ground-level ozone (O 3) represented the majority of total pollution removal by mass (79%) in 2017, with PM 10 the second largest. Figure 18: Ground level ozone represents the majority of pollutants removed by woodland Pollution removal, UK, 2017 Source: Office for National Statistics – Woodland natural capital accounts; Centre for Ecology and Hydrology Page 30 of 47
It is estimated that in 2017, the avoided health costs in the form of avoided deaths, avoided life years lost, fewer respiratory hospital admissions and fewer cardiovascular hospital admissions from the removal of harmful pollutants amounted to a substantial £938 million (Figure 19). Although the removal of PM 2.5 represents only 7% of the total mass of pollutants removed, the majority (97%) of the avoided health impacts are because of the reductions in PM2.5 concentrations. This is because PM 2.5 (fine particulate matter with a diameter of less than 2.5 micrometres, or 3% of the diameter of a human hair) is the most harmful pollutant by mass. PM 2.5 can bypass the nose and throat to penetrate deep into the lungs, leading to potentially serious health effects and healthcare costs. Figure 19: The removal of PM2.5 by woodland in the UK made up 97% of total avoided health costs in 2017 owing to air pollutant removal Avoided health costs from the removal of pollutants, UK, 2017 Source: Office for National Statistics – Woodland natural capital accounts; Centre for Ecology and Hydrology The present long-term asset value of woodlands calculated over a 100-year period with income uplift and population growth was £31.7 billion in 2017 (2018 price base). Flood mitigation Forests are known to reduce flood flows, according to a systemic review done by the UK Centre for Ecology and Hydrology, which looked at 71 studies. There is broad support for the conclusion that increased tree cover in catchments results in decreasing flood peaks, while decreased tree cover results in increasing flood peaks. Therefore, woodlands reducing the risk of a flood can be captured as a regulating ecosystem service. Page 31 of 47
To capture the flood regulating service for woodland in Great Britain, Forest Research examined how much it would cost to have flood water storage (that is, reservoirs) in an area where there was no woodland; they looked at the substitution costs of having no woodland. For more information on the method, see the methodology report . An annual average was estimated at £218.5 million per year for Great Britain: it would cost an estimated £218.5 million per year to create reservoirs able to capture that water if woodland in flood risk catchment (FRC) areas were replaced with grassland. In this study, 83% of the land area in Great Britain fell within a FRC area. The country with the largest annual value was England (£139.6 million), owing to the country having more people and settlements at risk of flooding. Some areas in Scotland were not included in the study as they were not deemed as FRC areas. The total Great Britain asset valuation of this service over 100 years equated to £6,513 million. However, there are a number of caveats with this calculation. For all limitations with this research, see the methodology report. Temperature regulation Woodlands can cool urban environments, which benefits the economy by avoiding labour productivity losses and reducing the use of artificial cooling, such as air conditioning. Economics for the Environment Consultancy (EFTEC) and others estimated in 2018 the cooling effect provided by woodlands for 11 city regions across Great Britain in Scoping UK Urban Natural Capital Accounts: Extension to develop temperature regulation estimates (PDF, 834KB) . The aggregate cooling effect varies between 0.15 and 0.39 degrees Celsius (Figure 20). This variation is because of the amount of woodland relative to the size of the city region; this is why Scottish regions have the highest cooling effects of all city regions. Page 32 of 47
Figure 20: Edinburgh city region observed the greatest cooling effect owing to the region having the greatest amount of woodland relative to the size of the urban area Average annual cooling effect of woodland in each of Great Britain’s city regions, 2014 to 2018 Source: EFTEC and others – Scoping UK Urban Natural Capital Account The cooling effect is valued through the estimated cost savings from air conditioning and the benefit from improved labour productivity. The benefit from improved labour productivity makes up most of the value, with avoided air conditioning energy costs only accounting for a small fraction. For more information on the method, see the Methodology section of the EFTEC and others 2018 report (PDF, 834KB) . Page 33 of 47
London gains the most as it has the biggest economy and the greatest number of hot days (22.9 days out of a total of 67.6 hot days in 2018, as seen in Table 10). “Hot days” throughout this section refers to any days equal to or between 28 degrees Celsius and 35 degrees Celsius. The £141.2 million increase in value from 2017 to 2018 was caused by a threefold increase in hot days from 2016 (Table 10). The London city region, the largest economy in this study, saw 22.9 hot days in 2018, more than double the 8.2 hot days experienced in 2016. Also, the Scottish regions of Edinburgh and Glasgow went from having 0 hot days and therefore no avoided costs in 2017 to having a joint total of 1.5 hot days and £1.3 million in avoided costs in 2018. While most city regions saw a significant increase in their annual value over the two years, the North East was the only region to experience fewer hot days. Table 10: The number of hot days increased significantly in 2018 to 67.6 days over the 11 city regions Number of hot days in each of the 11 regions of Great Britain, 2016 to 2018 Number of hot days City region 2016 2017 2018 Cardiff 1.3 3.1 5.0 Edinburgh 0.2 0.0 0.5 Glasgow 0.2 0.0 1.0 Greater Manchester 1.0 0.9 4.3 Liverpool 1.0 2.2 6.2 London 8.2 7.4 22.9 North East 0.4 0.0 0.1 Sheffield 2.4 1.9 5.7 West Midlands 2.8 4.6 10.6 West of England 1.6 4.6 8.5 West Yorkshire 1.1 1.0 2.8 Total 20.2 25.7 67.6 Source: EFTEC and others – Scoping UK Urban Natural Capital Account; Met Office Page 34 of 47
Table 11: The total annual value of cooling from urban woodland in 2018 was valued at £229.2 million Total annual value of cooling from urban woodland space in each of Great Britain’s city regions (£ thousand, 2018 prices), 2016 to 2018 Avoided costs City region 2016 2017 2018 Cardiff 1,195 1,812 1,448 Edinburgh 119 - 185 Glasgow 146 - 1,118 Greater Manchester 2,692 636 3,164 Liverpool 1,203 379 1,282 London 84,776 74,681 205,328 North East 108 27 33 Sheffield 1,209 1,122 2,713 West Midlands 4,116 5,140 8,228 West of England 1,607 3,483 2,967 West Yorkshire 1,723 725 2,675 Total 98,894 88,005 229,141 Source: EFTEC and others – Scoping UK Urban Natural Capital Account; Met Office Notes 1. The value presented here is slightly different to the value presented in the last urban report as we have adapted the air conditioning numbers to consider the amount of green space relative to London as well as the area of office space. For a full outline of the method used to calculate cost savings for air conditioning see Scoping UK Urban Natural Capital Accounts: Extension to develop temperature regulation estimates (PDF, 834KB). Back to table The total asset value increased by 54% from £4 billion to £6.1 billion between the 2012 to 2016 and 2014 to 2018 five-year averages (Figure 21). The number of hot days had significantly increased by 47 days. Page 35 of 47
Figure 21: The asset value of the urban cooling effect increased between the 2016 and 2018 averages by 54% owing to a rise in the number of hot days Total asset value of the environmental assets for each city region in Great Britain over three five-year averages, 2012 to 2018 Source: EFTEC and others – Scoping UK Urban Natural Capital Account; Met Office We can now examine the potential productivity benefits of converting one percentage point of the urban area into woodland. An increase in woodland by one percentage point in all city regions (relative to the urban area) could lead to an estimated saving in labour productivity of at least £12.8 million. These numbers are calculated using the five-year hot-day average (2014 to 2018). As expected, we have seen an increase of just over £3 million from the previous five-year hot-day average (2013 to 2017) owing to the progress of climate change. Page 36 of 47
Table 12: A one percentage point rise in woodland relative to the urban area can lead to an overall saving in labour productivity of at least £12.8 million in 2018 Avoided productivity losses from a 1% rise in woodland by city region in Great Britain based on an average of hot days between 2013 to 2017 and 2014 to 2018, (£, 2018 prices) Avoided labour productivity costs City region 2013 to 2017 2014 to 2018 Cardiff 115,480 126,540 Edinburgh 4,470 4,730 Glasgow 5,180 28,330 Greater Manchester 196,750 249,170 Liverpool 91,850 128,430 London 7,784,330 10,988,470 North East 9,010 7,890 Sheffield 131,430 173,860 West Midlands 589,130 640,630 West of England 261,650 280,500 West Yorkshire 137,190 172,190 Total 9,326,470 12,800,740 Source: Office for National Statistics – Woodland natural capital accounts; EFTEC and others – Scoping UK Urban Natural Capital Account; and Met Office Noise reduction Vegetation acts as a buffer against noise pollution, in particular road traffic noise. Noise pollution causes adverse health outcomes through lack of sleep and annoyance. EFTEC and others reported in 2018 (PDF, 834KB) initial estimates of the benefits of noise reduction from vegetation, which just includes woodland. Urban vegetation includes both large (greater than 3,000 square metres) and smaller (less than 3,000 square metres) woodlands but does not include very small woodlands (less than 200 square metres). These estimates are considered minimum values, but further work is needed to develop more refined and robust estimates. According to the noise action plan in urban areas published by the Department for Environment, Food and Rural Areas (Defra), 8,022,000 people were in agglomerations where road traffic was greater than 60 decibels. An example of sound that produces 60 decibels or more is normal speech. These are considered minimum values, but further work is needed to develop more refined estimates. The total number of buildings in UK urban areas that benefitted from a reduction in noise in 2017 was 167,000. Page 37 of 47
Table 13: 167,000 buildings in the UK benefited from noise reduction owing to woodland Number of buildings where road noise levels are mitigated by woodlands, decibel, UK, 2017 Number of buildings benefiting from noise mitigation by urban vegetation Noise band in noise (rounded to the nearest thousand) metric by decibel Northern England Scotland Wales UK Ireland Greater than or equal - - - - 0 to 80 75.0 to 79.9 1,000 - - - 1,000 70.0 to 74.9 8,000 - 1,000 - 9,000 65.0 to 69.9 36,000 1,000 3,000 1,000 41,000 60.0 to 64.9 98,000 6,000 8,000 4,000 116,000 Total 143,000 7,000 12,000 5,000 167,000 Source: EFTEC and others – Scoping UK Urban Natural Capital Account Notes 1. 5dBA bands applied along with guidance in Defra’s noise pollution: economic analysis published in 2014. Back to table 2. The number of dwellings receiving mitigation from woodland in Scotland is likely to be lower than the rest of the UK because EFTEC and others (2018) used the Lden noise metric, which measures any level of noise over a 24-hour period, with penalties later at night. However, the LA1018h is used for the rest of the UK. This is because LA1018H was unavailable for Scotland. Back to table The total annual value of noise reduction in the UK was £15.3 million in avoided loss of quality adjusted life years (QALY) during 2017 (Table 14). Valuations based on QALY are economic welfare values, which look into how noise reduction affects people’s social welfare. Page 38 of 47
Table 14: Noise mitigation provided by small woodlands in the UK led to a saving of £15.3 million in avoided loss of quality adjusted years associated with adverse health outcomes Monetary flow accounts for the noise mitigation of urban woodland, £ million (2018 prices), UK, 2017 Annual value of noise mitigation of 1dBA (£ million) Noise band England Scotland Wales Northern Ireland UK Greater than or 1,000 - - - 1,000 equal to 80 75.0 to 79.9 148,000 - 11,000 2,000 161,000 70.0 to 74.9 1,104,000 8,000 106,000 56,000 1,274,000 65.0 to 69.9 4,026,000 124,000 313,000 141,000 4,604,000 60.0 to 64.9 7,778,000 481,000 672,000 324,000 9,255,000 55.0 to 59.9 - - - - 0 50.0 to 54.9 - - - - 0 45.0 to 49.9 - - - - 0 Total 13,057,000 613,000 1,102,000 523,000 15,295,000 Source: EFTEC and others – Scoping UK Urban Natural Capital Account: Extending noise regulation estimates Notes 1. 5dBA bands applied along with guidance in Defra’s noise pollution: economic analysis published in 2014. Back to table The asset value for noise reduction based on estimated future benefits over 100 years was worth £833 million (Table 15). A number of assumptions are also made when estimating the future flow of the noise mitigation value by urban vegetation and woodland. For more information on these, see Scoping UK Urban Natural Capital Account – Noise extension (PDF, 2.37MB) . Table 15: The asset value for noise regulation in England provided by urban woodland had an estimated worth of £710 million in 2017 Asset value of ecosystem service from noise mitigation, £ million (2018 prices), UK, 2017 Annual value of noise mitigation of 1dBA (£million/year) Noise band England Scotland Wales Northern Ireland UK Greater than or - - - - 0 equal to 80 75.0 to 79.9 8 - 1 - 9 70.0 to 74.9 60 - 6 3 69 65.0 to 69.9 219 7 17 8 251 60.0 to 64.9 423 26 37 18 504 Total 710 33 61 29 833 Source: EFTEC Page 39 of 47
7 . Cultural ecosystem services: quantity and value Cultural ecosystem services provide non-material benefits like enjoyment of the landscape, recreation in woodlands, education and cultural heritage. Recreation In 2017, there were an estimated 475.2 million visits to and 718 million hours spent in UK woodlands. This service was valued at £515.5 million. Recreational visits in nature are valued based on expenditure per trip (that is, fuel, public transport costs, admission costs and parking fees). For more information on how we calculate the annual value, see Woodland natural capital accounts methodology guide, UK: 2020 . Visits and time spent in woodland areas have generally gradually increased over the time series, with an especially steep increase in the average time spent in woodland habitat from 2015 to 2017 (Figure 22). Figure 22: Visits to UK woodlands have increased by 39% since 2009 Number of visits and hours spent in woodlands, UK, 2009 to 2017 Source: Monitor of Engagement with the Natural Environment Survey, The Welsh Outdoor Recreation Survey, and Scotland’s People and Nature Survey Page 40 of 47
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